In April, President Obama and Russian President Dmitry Medvedev signed the New START Treaty, the biggest nuclear arms pact in a generation. But the treaty faces significant Republican opposition as it enters the Senate for a final vote. How would a blocked treaty affect our arms policy and our relationship with Russia?

The nuclear abolition documentary Countdown to Zero is not just a howl of alarm or a historical primer. It's a shocking but completely reliable account of the issue of nuclear weapons as it exists today.